1. Department of Health Management, Nishinihon Occupational Health Service Center, Kitakyushu, Japan
2. Department of Occupational Health Practice and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
3. Bureau of International Health Cooperation, National Center for Global Health and Medicine, Tokyo, Japan
4. Department of Occupational Health and Safety, Faculty of Public Health, Mahidol University, Bangkok, Thail
5. College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland, Australia